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dc.contributor.authorQian, X.
dc.contributor.authorRenzo, M. Di
dc.contributor.authorLiu, J.
dc.contributor.authorKammoun, Abla
dc.contributor.authorAlouini, Mohamed-Slim
dc.date.accessioned2020-09-08T07:37:53Z
dc.date.available2020-09-08T07:37:53Z
dc.date.issued2020
dc.date.submitted2020-05-15
dc.identifier.citationQian, X., Di Renzo, M., Liu, J., Kammoun, A., & Alouini, M.-S. (2020). Beamforming Through Reconfigurable Intelligent Surfaces in Single-User MIMO Systems: SNR Distribution and Scaling Laws in the Presence of Channel Fading and Phase Noise. IEEE Wireless Communications Letters, 1–1. doi:10.1109/lwc.2020.3021058
dc.identifier.issn2162-2345
dc.identifier.doi10.1109/LWC.2020.3021058
dc.identifier.urihttp://hdl.handle.net/10754/665007
dc.description.abstractWe consider a fading channel in which a multi-antenna transmitter communicates with a multi-antenna receiver through a reconfigurable intelligent surface (RIS) that is made of N reconfigurable passive scatterers impaired by phase noise. The beamforming vector at the transmitter, the combining vector at the receiver, and the phase shifts of the N scatterers are optimized in order to maximize the signal-to-noise-ratio (SNR) at the receiver. By assuming Rayleigh fading (or line-of-sight propagation) on the transmitter-RIS link and Rayleigh fading on the RIS-receiver link, we prove that the SNR is a random variable that is equivalent in distribution to the product of three (or two) independent random variables whose distributions are approximated by two (or one) gamma random variables and the sum of two scaled non-central chi-square random variables. The proposed analytical framework allows us to quantify the robustness of RIS-aided transmission to fading channels. For example, we prove that the amount of fading experienced on the transmitter-RIS-receiver channel linearly decreases with N1. This proves that RISs of large size can be effectively employed to make fading less severe and wireless channels more reliable.
dc.description.sponsorshipThis work was supported by the European Commission through the H2020 projects 5GstepFWD (grant 722429) and ARIADNE (grant 871464). The associate editor coordinating the review of this article and approving it for publication was H. Ngo
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.relation.urlhttps://ieeexplore.ieee.org/document/9183991/
dc.relation.urlhttps://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9183991
dc.rights(c) 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
dc.subjectSmart surfaces
dc.subjectfading
dc.subjectperformance analysis.
dc.titleBeamforming Through Reconfigurable Intelligent Surfaces in Single-User MIMO Systems: SNR Distribution and Scaling Laws in the Presence of Channel Fading and Phase Noise
dc.typeArticle
dc.contributor.departmentCommunication Theory Lab
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.identifier.journalIEEE Wireless Communications Letters
dc.eprint.versionPost-print
dc.contributor.institutionUniversité Paris-Saclay, CNRS, Centrale Supélec, Laboratoire des Signaux et Systèmes, 91192 Gif-sur-Yvette, France.
dc.identifier.pages1-1
kaust.personKammoun, Abla
kaust.personAlouini, Mohamed-Slim
dc.date.accepted2020-08-28


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